Concise way to destroy user's session in Rails -


ok, there appears few approaches 'destroying' user's session , there may subtleties between them , how app handles user sessions.

first, why examples don't use session.delete(:current_user_id) delete :current_user_id value (and hash key!)? typical example looks below (i added deleting :return_to since if signing out, why there need track return_to value). 

  def sign_out     self.current_user = nil     session[:current_user_id] = nil     session.delete(:return_to)   end

if app needs delete session variables , values, isn't safer use session = nil or session.destroy? destroy hash entirely. make sense keep current_user_id in session hash if app supports... tracking of anonymous users ?!?!

thoughts?

by setting session nil you're losing information session (that may included except current_user or used rails) + putting risk of using hash method (like #[]) on nil raise exception won't expect it.


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